- Siriella armata
- Siriella clausii
- Siriella jaltensis
- Siriellinae
- Socarnes erythtophthalmus
- Socarnes filicornis
- Sphaeroma monodi
- Sphaeroma serratum
- Spirontocaris lilljeborgi
- Spirontocaris spinus
- Stegocephaloides christianiensis
- Stenopleustes nodifer
- Stenothoe microps
- Stenothoe monoculoides
- Stenula rubrovittata
- Stylocheiron longicorne
- Sunamphitoe pelagica
- Sylon hippolytes
- Synchelidium haplocheles
- Synchelidium maculatum
- Synchelidium tenuimanum
- Talitrus saltator
- Talorchestia deshayesii
- Tanais dulongii
- Tanaopsis graciloides
- Thia scutellata
- Thoralus cranchii
- Thysanoessa inermis
- Thysanoessa longicaudata
- Thysanoessa raschii
- Tiron spiniferus
- Tmetonyx cicada
- Tortugaster boschmai
- Triangulus galatheae
- Triangulus munidae
- Trypetesa lampas
- Tryphosella horingi
- Tryphosella nanoides
- Typhlotanais aequiremis
- Typhlotanais microcheles
- Unciola crenatipalma
- Unciola planipes
- Upogebia deltaura
- Upogebia pusilla
- Upogebia stellata
- Urothoe poseidonis
- Varuninae
- Vaunthompsonia cristata
- Verruca stroemia
- Westwoodilla caecula